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Welcome to the Z88 User Guide.

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This is the revised Z88 User Guide for OZ ROMthe Cambridge Z88, being updated with all new features and improvements that has been added into the "OZ" operating system ROM, both on application and system level by the Z88 Development Team since the last official V4.0 UK ROM was released by Cambridge Computer in 1989.

The Z88 Development Team reverse-engineered the V4.0 ROM into source code and after thirteen years of development, in 2003 and has since then done substantial re-organisation and optimisation of the existing OZ code base, the work is finally ready, fulfilling now fulfilled many of the original end-user wishes expressed in the independent end-user "Z88 EPROM" publishing made available in the early nineties.

Improvements include the following:Per Svensson - a dedicated Z88 user - did all the OCR scanning of the printed 4th edition and converted it to HTML. With his permission, we continued the process, replaced all virtually drawn screenshots with live snapshots from the Z88 emulator and finally converted it into this wiki.

Major improvements developed since original release by Cambridge Computer

• Save and Load Files directly to the File Area - no need to save the file to RAM first. Use :EPR:1, 2 or 3 from directly from the Application. (From OZ 4.7)
• Run Application in RAM - No need to have applications in Flash or EPROM card, just get and use RAM. 
• Multiple Language & Keyboard selection - The popular foreign ROM's can now be selected; choose from a range of countries, use different keyboard layouts and see the change of languages in the localized date names in the the Clock, Calendar and  and Diary
  • Supported languages are:- UK (default) USA, French, German, Spanish, Italian, Danish, Norwegian, Swedish and Finnish
• Filenames may now use the complete ISO character set, allowing to use characters such as é and å in filenames.
• Fast Serial Port - all speeds and protocols supported with reliable file transfer up to 38400 baud
• Eazylink2 connects  connects to 21^_st century  century Desktop computers with support for the original file transfer Imp/Export popdown
• XMODEM XMODEM and YMODEM protocol  YMODEM protocol added to Imp/Export popdown
• BBC BASIC V3.10. Now includes the "patch" integration from the V2.2 / V3 UK ROM
• Fast Backup using  using Flash cards support in  support in Filer and  and Flashstore. Flash cards are FORMATTED by the Z88 itself. - No need to use EPROM Cards or the EPROM Eraser to FORMAT them
• Terminal supports  supports all VT52 commands

• Main Main HELP pages  pages repopulated and expanded  from ROM V3.0 UK (from OZ 4.0) - Click here to see a small movie of the HELP added

• System Info page  page in Index that displays OZ build release information, battery status and free system resources

• Alarms can  can be saved to file (for backup and restore across soft reset)

• EPROM is  is checked that it is empty before cataloguing the first time

Available editions of Z88 User Guide

The following table lists the released editions of the Z88 User Guide, provided by the Z88 Development Team and others:

Non-English language manuals

Here are a number of foreign language manuals, available for download via the links in the table below.

Latest online edition

We're constantly editing the user guide, reflecting the current development of the Z88 operating system. Click on chapters as seen below, or use search to specific details.